Solved, i deleted the folder and reinstalled the game, my thoutghs on the registry are correct

Sorry I was late.

But if you ever jack up a program install in windows, I suggest backing up the registry, then running regedit and doing a search for the game name and publisher, deleting only the registry files with the game's name in it.

You may have been as well off wiping formatting your second hard drive and reinstalling everything because you had to reinstall anyway. Though a fresh format would've lowered available space a tiny bit.